Carbureter.



1. w. SWAN. CARBURETER. APPLICATION FILED DEC. 1]. 19M.

Patented Mar. 26, 1918.

- 2 SHEETS-SHEET I- ATTOR/VEVB J. W. SWAN.

CARBURETER.

APPLICATION FILED 05c. n. 1914.

Patented. Mar. 26, 1918.

2 SHEETS-SHEET 2.

A TTORIVEYQ w a b 1 till TQE.

' JOHN w. swan, or SAN FRANCISCO, CALIFORNIA.

CARBURETER.

Leedsea.

Specification of Letters Patent.

Patented Mar. 26, 1918..

Application filed December 11, 1914. Serial No. 876,720.

To all "whom it may concern Be it known that I, JOHN W. SWAN, a citizen of the United States, residing atthe city and county of San Francisco and State of California, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

The present invention relates to improvements in earbureters, and more particularly to that type of carbureter designed for use in connection with internal combustion engines employing the lighter grades of fuel.

The invention has for one of its principal objects to provide a carbureter having an improved form of needle valve operating adjustment, whereby one speed adjustment of the needle valve may be varied without in any manner affecting the others on the regulation thereof.

It is an object of the invention to provide a carbureter with an improved form of controlling device for varying the volume of fuel to issue from the needle valve and to be controlled by the needle valve operating adjustment.

A further object of the invention is to provide a distributing valve formed with a central opening and in which is mounted the needle valve, whereby the gasolene fed into the mixing chamber will be thoroughly atomized. Other objects are to provide a carburetor which is simple in construction,

' 1s composed of but few parts and is readily accesslble for cleaning or repairs.

With the above mentioned and other objects in view, the invention consists in the novelconstruction and combination of parts hereinafter described, illustrated in the accompanying the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention reference is directed to the accompanying illustration, wherein- Figure 1 is a view in side elevation of the improved carbureter forming the subject matter of the present invention. Fig. 2 is a vertical central sectional view of the carbureter. Fig. 3 is a view in detail of the throttle valve controlling means. Fig. 4 is drawings, and pointed out in" a detail side elevation of the throttle valve and the controlling means therefor. Fig. 5 is a view in detail of the needle removed from the throttle valve. Fig. 6 is a, detail vertical sectional view of the throttle valve and mixing chamber, disclosing the needle valve and the operating and adjusting means therefor. Fig. 7 is a. top detail plan view of the adjusting means for the auxiliary throttle valve. Fig. 8 is a side elevation of the structure disclosed in Fig. 7. Fig. 9 is a view in detail of the fuel feed passage from the float chamber to the mixing chamber. Fig. 10 is a View in detail of the plunger on the end of the auxiliary air inlet valve stem.

Referring more particularlyto the several View of the drawings, wherein like characters of reference designate corresponding parts throughout the several views-- 1 is a carbureter casing formed with the cylindrical passage 2 enlarged at its upper end, as at 3, and open at its lower and upper ends, as at 4, and providing a mixing chamber. 5 is a float chamber into which the fuel passes from the inlet connection 6, and said connection is controlled by a needle valve 7 cooperating with a removable and adjustable seat 8 (Fig. 2) and loosely carried by the arms 9 of a lever 10 which is pivotally mounted as at 11 in a passage 12 between the float chamber and the chamber 13 in which the needle valve is mounted. The lever 10 carries on its end within the float chamber an annular float 14 and the upper end 15 of the needle valve operates through a guide 16.

By adjusting the valve seat 8 in its mounting, the height of the level of the fuel within the float chamber may be readily regulated, without bending the arms 9, as is at present the custom, or without the necessity of having access to the interior of the float chamber.

The float chamber is covered by a removable member 17 retained in position by screws 18, and said cover is formed with a chamber 19 which communicates through a passage 20 with the enlarged portion 3 of the mixing chamber. An annular deflector 21 projects upwardly into the enlarged portion 3 directly overlying the passage 2 to a I of the suction within the passage 2.

tends a valve stem 23 carrying a seat 24, and loosely mounted between the underside of said seat and. a nut 25 is an annular valve 25'. A tubular member 26 is threaded into an opening in the upper end of the chamber 19 and the lower end of the same provides a seat against which abuts a disk valve 27 carried by the stem 23 and said structure provides an auxiliary air inlet opening. The recess 21, seat 24, and valve 25, form a dash pot, to prevent the sudden opening of the valve 27. A. spring 28 normally seats the valve 27, and the member 26 is formed on its upper end with serrations 29 for cooperating with a yieldable member 30 for maintaining said member 26 in its adjusted position. 4 I

The provision of a dash pot, as above described, air inlet valve, will prevent the sudden opening of the valve on the creation of a sudden suction within the passage 2, will thus overcome the starving of the engine, will provide a means for admitting of a gradual opening of the valve, and will permit the valve to be closed rapidly on the reduction It will be apparent that the valve 25 will, on the downward movement of the stem 23, be

forced tightly against the seat 24 and will fluid upwardly in the recess and that on the upward movement of the stem the valve will drop by gravity and permit the fuel to pass through the open- /ing in the same which is spaced from certain edges of the nut 25. p x

Transversely disposed in the passage 2 is a rotatably mounted fuel distributlng valve 31 of the butterfly type. The valve is formed with a hub 32 and the annular end portions 33, (Figs. 4 and 6) one of which end portions rests 1n a. seat 34 in the side wall of the passage and the other abuts against the hub in a closure plate 35 posi tioned over theopening through which the valve is inserted and held in position by the screws 36.

A tubular bore 37'is formed centrally of the valve and the same is intersected by a transversely extending opening 38 which provides an outlet for the fuel. into the mixing chamber and also provides an air passage through the valve.

A boss 39 normally closedby a movable plug 39, Figs. 6 and 9, is formed on one side wall of the tubular member 2 and the same connects through a channel 40 with the lower portion of the float chamber 5. A channel connects the interior of the boss with the tubular bore 37 of the valve 31, and in said bore is threaded a tubular member 40' forming a discharge nozzle which extends into one end of the boie 37 to a point approximately centrally of the intersecting opening 38, and the outer end of said memin the hub 32,

in connection with the auxiliary member,

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with .an annular seat 43 and against said seat operates a spring 44 mounted in a recess and said spring is adapted to unseat said valve.

Arms 46-Figs. 1-3 and 4, extend from the outer face of said closure plug 35 and carry an annular interiorly threaded supporting member 47 into which is threaded an adjustable cam carrying ring 48 to which is secured by screws 49 the plate 50. The

plate is formed with serrations 51 with which are adapted to coiiperate the locking means 52, which retains the member 47 in its adjusted position when it is so desired. A perforated arm 53 carrying a lug 53 for engagement with the serrations 51 is pivota-lly carried by the plate and to the end of the same is secured the end of an operating member 54 operating in a guide 55 secured by a screw 56 to the arm 57 carried by the member 47 Detachably secured to the hub 32 is the valve turning member 57 formed with an arm 58 which is adapted to be limited in its movement by contact with the said arms 46, and said turning member is formed on its outer face with a guide 59 in which is adapted to be received the lower end of a controlling arm or lever 60, the extreme lower'end of which abuts against and operates over the inner face of the adjustable cam carrying ring 48 which forms a fulcrum for the same. The armor lever 60 is provided within'its length with an opening 61 in which is threaded an adjusting screw 62 locked bya nut 63 and formed with a ball recess adapted to receive the ball end 42 of the needle valve 41. v

The cam carrying ring 48 in providing a fulcrum for the lower end of the lever 60, also provide a means for regulating the position of the needle valve relative to its seat, whereby the valve will in turn regulate the valume of fuel to pass from the fuel charge nozzle. It will be observed that the cam carrying ring 48 maybe operated from a point distant from the carbureter by means of the operating member 54.

On the operation of the valve turning relative to its seat nism.

Suitable headed screws by the following mecha- 64 are received in the threaded openings in the arms 65 carried by the member 47 and said arms are slotted as at 47 and are adapted to be tightened about the screws to maintain the 'same in their adjusted position by the clamping disthe needle valve 41 will be operated.

screws 47. The screws are formed with contracted shanks 67-Figs. 1-34 and 6. which extend through the slot 68 in the wall of the curved tubular segment 69 and each shank carries on its end an enlarged ball head 69 which is received within the tubular portion of the segment. A coiled spring 0 is positioned in the tubular segment be-' tween adjacent ball heads and 'maintains'the same in frictional contact therewith. The upper end of the controlling lever 60 is operated in its movement over the segment 69 to control the needle valve 41, as set by the adjustable cam carrying ring 48, and it will be apparent by mounting the segment on the ends of the adjusting screws and providing a universal joint between the end of each screw and the segment that either of said screws may be independently adjusted without varying the portion of the segment adjacent the screws not adjusted. By providing an adjustable fulcrum for the lower end of the lever 60, the needle valve may be readily adjusted relative to its seat, and the'upper end of the,arn1 operating over the segment 69 will operate the adjusting valve.

The lever 60 is limited in its movement over the segment 69 by the arm 58 contacti g with said arms 46 and the extreme limits of movement of said lever 60 over said segment are directly over the headed adjusting screws 64 at the ends of the segment. In adjusting the screws 64 to change the angle of inclination of the segment 69 only that portion of the segment adjacent "each screw 64 is adjusted on the movement thereof, owing to the ball end 69 being received in the tubular central portion of the segment 69 which provides a universal joint between each adjusting screw and the segment.

It will be' apparent that after the fulcrum has been adjusted to set the needle valve, the operation of the arm over the segment will regulate the movement of the adjusted valve.

The end of the arm 58 is connected by a link 71 with one end of an arm 72 carried by a longitudinally hanneled plate 73 Figs. 1.-7 and 8, which loosely fits over one end of a rotary shaft 74 extendin through the upper end of the enlarged c amber 3 and carrying a butterfly throttle valve 74'. The shaft carries an adjusting plate 75 secured thereto by a pin 7 6 and seated in the channel of the plate 73, and said adjusting plate carries at its ends adjusting screws 77 which permit of a slight adjustment of the butter y valve 74 relative to the plate 73 and relative to the valve 31. The arm 78 extending upwardly from the plate 73 is adapted to be connected to any suitable opcrating mechanism.

The usual vent openings 7 9 are formed in -with the fuel issuing from the tit th1s case are provided in the cover 17, one

providing a communication between the at mosphere and the float chamber and the other between the float chamber and the chamber 19, which will permit the gas from the fuel in the float chamber to pass off into the mixing chamber.

y removing the screws 36, the entire fuel distributing valve, needle valve, and operating means may be readily removed from the casing for clearing or repairs;

When the fuel distributing position extending approximately transversely of the passage 2, at which time the lever 60 is in its low speed position, the opening 38 in the valve will permit the air to pass therethrough and closely contact with the fuel issuing from the discharge nozzle 40, thereby thoroughly carburizing the same. a

By connecting the fueldistributing valve and butterfly valves, the same are capable of being operated in unison to supply a thoroughly carburized charge of fuel, and by providing the adjusting means, as above described, the throttle valve may be adjusted relative to the fuel distributing valve. The throttle valve is constructed so as to permit the air to pass therethrough and to intermix discharge nozzle, the air passing the nozzle at right angles will draw the globules laterally from the end of the nozzle, and this action will break the globules into minute particles, providing a greater surface open to the action of the air than if the globules were unbroken.

I claim 1. A carbureter comprising a casing having an air passage therein, a fuel distributing valve tiltingly mounted therein, a needle valve in said fuel distributing valve, means or operating said fuel distributing and said needle valves, includin a lever, an adjustable fulcrum over which the lower end of said lever operates, a guide over which the upper'end of said lever operates, independently adjustable supporting means for mounting said guide intermediate its ends, and a. spring associated with said needle valve for maintaining the same in contact with said lever intermediate its ends.

2. A. carbureter comprising a casing having an air passage therein, a fuel distributing valve mounted within the air passage, having a hollow hub portion, a nozzle in the hub portion adapted to conduct fuel into the valve is in a air passage, a needle valve mounted in said ing an air passage therein,

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operates, independently adjust-able supporting means for mounting said guide and each connected thereto by a universal oint, and a spring for maintaining said needle valve in contact with said lever intermediate its ends,

3. A carbureter comprising a casing hav ing and air passage therein, a needle valve and a seat therefor, means for operating said needle valve including a lever, a curved tubular guide over which said lever operates, and independently operated adjusting means provided with ball heads adapted for reception in said guide to support the same, said heads providing a universal joint between the adjusting means and the guide.

. A. A carburetor having an air passage therethrough, a fuel distributing valve removably mounted through an opening in the wall of said air passage and having an .air

passage therethrough for the distribution of fuel from said valve, a hollow trunnion entering the fuel distributing valve from one side'for delivering fuel thereto, a hub eX- tending from the fuel the opposite side and formed with an axial bore, a closure plate through which said hub extends and adapted to close said fuel distributing valve insertion opening, a needle valve mounted in said axial bore and adapted to seat in the end of said trunnion, a spring for normally unseating said valve, a supporting member carried by said closure plate, a fuel distributing and needle valve operating lever associated with said hub and cooperating with'said needle valve, an adjustable fulcrum for the lower end of said lever, and an adjustable guide on which the upper end of said lever operates.

5. A carbureter having an air passage therethrough and provided in its side wall with a fuel distributing valve insertion openin a throttle valve, a fuel distributing val i e removably mounted through said opening and having a passage therethrough for the distribution of fuel, a hollow trunnion entering the valve from one side for delivery fuel thereto, a tubular hub extending from the throttle at the opposite side, a closure plate through which said hub extends for securing to the wall of said air passage and for closing said valve insertion opening, a needle valve in said tubular hub, a lever for operating said fuel distributing and needle valves, and controlling means for said lever carried by said closure plate.

6. A carbureter comprising a casing hava fuel distributing valve tiltingly mounted therein, a needle valve in said fuel distributing valve, means for operating said throttle and said needle valve including a lever, a guide over which said lever operates, an ad ustable fulcrum for the lower portion of the lever independently adjustable supporting means for said distributing valve at nascent guide, a throttle valve tiltingly mounted in said air passage, and means cooperating with said valves to cause the same to operate in unison.

7. A carbureter having a central air passage therethrough, a fuel distributing valve in said passage, a throttle valve mounted in said passage and formed with a supporting shaft, oppositely disposed arms carried by said shaft and each carrying an adjusting screw, an adjusting plate loosely mounted on said shaft and adapted to be engaged by said adjusting screws, and an operating lever carried by said plate, and connected with the fuel distributing valve whereby the said valves act in unison.

8. A carbureter comprising a casing having an air assage therein, a fuel distributing valve ti tingly mounted therein, a needle valve in said fuel distributing valve, means for operating said fuel distributing and needle valves, including a lever, a fulcrum for one end of said lever and over which the same operates, and a guide over which the other end of said lever operates for controlling the throw thereof.

9. A earbureter comprising a casing having an air passage therein, a fuel distributing valve tiltingly mounted therein, a needle valve in said fuel distributing valve, means for operating said fuel distributing and needle valves including a lever, an adjustable fulcrum for said lever and on which the same operates, means for positively holding the fulcrum in its adjusted position and an adjustable guide over which said lever operates for controlling the throw thereof. I

10. A carbureter comprising a casing, having an air passage therein, a fuel supply, a valve therefor, means for controlling said valve including a lever, a uide over which said lever operates, and a p urality of spaced adjusting means for said guide having a universal joint connection therewith to enable different portions of the said guide to be adjusted.

11. In a carbureter comprising a casing, an air passage therein, a fuel feed, a needle valve and a seat therefor, means for controllld ling said valve including a lever, a guide an operating lever carried by the adjusting part and connected With the fuel distributing valve to cause the said valves to Work in unison, and permit the independent adjustment of each other.

13. A carbureter having an air passage passing therethrough, a valve and a seat therefor, a lever having an opening therein intermediate its ends, adapted to receive a portion of the valve, an adjustable member fitted in said opening and against which the valve rests, a spring contacting with the valve for retaining the same against the adjustable member, a fulcrum for the lever and a guide for varying the throw of said lever over which the lever operates.

14. A carbureter comprising a casing having an air passage therein, a fuel distributing valve provided with a fuel port mounted for an oscillating movement in the air passage, a needle valve for controlling the port in said fuel distributing valve, a valve turning member carried by said fuel distributing valve, a lever in engagement with the needle valve for operating the, same and entering a guide within the valve turning member permitting a slight rocking movement of the lever relative to the valve turning member, but compelling a shifting of the fuel distributing valve upon a rotary movement of the lever.

15. A carbureter comprising a casing hav- 'needle valve in ing an air passage therein, a ported distributing valve capable of an oscillatory movement disposed within the air passage, a

the distributing valve for controlling the flow of fuel thereto, means adapted to actuate the needle valve upon the shifting of the distributing valve, a throttle valve overlying the distributing 40 valve, and a connection between the throttle valve and the distributing valve whereby the needle valve, the throttle valve and the distributing valve all act in unison.

16. A carbureter comprising a casing having an air passage therein, a ported distributing valve having a horizontal passage therein mounted for movement in the air passage, a shiftable needle valve disposed within the horizontal passage in the distributing valve, means adapted to actuate the needle valve upon the shifting of the distributing valve, a pivotal throttle valve overlying the distributing valve, a link connection between said valves whereby the 5 needle valve, the throttle valve and the distributing valve are all actuated in unison.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN W. SWAN.

Witnesses HARRY A. TO'IT'EN, D. B. RICHARDS. 

